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United States Patent | 5,041,878 |
Takai ,   et al. | August 20, 1991 |
In a transfer method of a colored image, the process speed is initially properly set in accordance with the size of a copy paper sheet to be used. The transfer voltage is then changed in accordance with the process speed. After these processes, a colored toner image formed on a photoconductor is first transferred onto an intermediate transfer medium and then further transferred onto the copy paper sheet.
Inventors: | Takai; Yasuhiro (Sakurai, JP); Kamimura; Taisuke (Nara, JP); Shimazawa; Yoichi (Nara, JP); Nukushina; Etsuzi (Nara, JP) |
Assignee: | Sharp Kabushiki Kaisha (Osaka, JP) |
Appl. No.: | 456864 |
Filed: | December 27, 1989 |
Jan 09, 1989[JP] | 1-2601 |
Current U.S. Class: | 399/302 |
Intern'l Class: | G03G 015/14; G03G 015/01 |
Field of Search: | 355/271,272,273,274,281,327,326,311 430/126 |
4431301 | Feb., 1984 | Hashimoto et al. | 355/274. |
4468113 | Aug., 1984 | Motohashi et al. | 355/271. |
4733269 | Mar., 1988 | Kasahara et al. | 355/271. |
4862214 | Aug., 1989 | Kasahara et al. | 355/277. |
4872037 | Oct., 1989 | Kasahara et al. | 355/271. |
4931839 | Jun., 1990 | Tompkins et al. | 355/271. |
4933727 | Jun., 1990 | Mizuma et al. | 355/272. |
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